[Suggestion] Random function and system time

[TCreopargh]

This will be really helpful in many cases (for example display tips randomly rather than in order) My thoughts are letting random functions accept a optional seed so it always returns the same value with the same seed, and use system time (rounded to a scale like 10 seconds) so that every time when the game starts, it displays different tips rather than the same order of tips every time.

[AlexIIL]

Yes, these sound essential.

I'm probably going to add:

1. generate_seed(): Generates a new (48 bit integer) seed for use in other functions. (This should be saved in constants).
2. random(seed): calls random_seeded(seed, 0)
3. random(seed, index): returns a random number (between 0 and 1) based on both the seed and index - the idea being that you'd keep the seed the same, and pass an ever-increasing index to grab the next value for that seed.
4. random_int(seed, max): calls random_int(seed, 0, max)
5. random_int(seed, index, max): returns a random integer between 0 and max-1. Internally this is just min(max - 1, random(seed, index) * max), but it's a lot easier to type this way.

[AlexIIL]

I'm not so sure about using the system time directly for this - I'd rather people do:

"constants": {
    "tip_interval": 8.0,
    "tip_seed": "generate_seed()",
    "slideshow_seed": "generate_seed()"
},
"renders": [{
    "image": {
        "parent": "builtin/text",
        "text": "(has_tips() & tip_interval > 0) ? tip(random_int(tip_seed, floor(time / tip_interval), tip_count())) : ''",
        "position_type": "BOTTOM_CENTER",
        "offset_pos": "BOTTOM_CENTER",
        "position": { "x": 0, "y": -10 }
    }
}]

Instead, as then I can generate proper random numbers based off whatever additional information the system has for secure random numbers.